One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(5,6)(7,10)(8,11)(9,12)(13,14,18,24)(15,25,16,20)(17,22,19,23)(21,26,28,27)(5,7,10,6)(8,11,9,12)(13,15)(14,20)(16,18)(17,27)(19,26)(21,23)(22,28)(24,25)(13,16,18,15)(14,21,24,28)(17,27,19,26)(20,22,25,23)(5,8,10,9)(6,11,7,12)(13,17,18,19)(14,22,24,23)(15,26,16,27)(20,21,25,28)(1,3,4,2)(5,9,10,8)(6,11,7,12)(13,17,18,19)(14,23,24,22)(15,26,16,27)(20,28,25,21)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.